Space & Stars
61 free space & stars calculators — including Exoplanet Habitability Calculator and Moon Phase Calculator. Instant results in your browser, with the formula shown.
Search Space & Stars calculators
Planetary Transit Calculator
Calculate planetary transit properties.
Pulsar Period Calculator
Calculate pulsar properties.
Nebula Distance Calculator
Calculate nebula distance using expansion method.
Galactic Rotation Calculator
Calculate galactic rotation velocity.
Roche Limit Calculator
Calculate the Roche limit for satellite disruption.
Cosmic Microwave Background Calculator
Calculate CMB properties.
Aurora Visibility Calculator
Calculate aurora visibility probability.
Gravitational Lensing Calculator
Calculate light deflection angle by gravity.
Comet Orbit Calculator
Calculate comet orbit characteristics.
Star Spectral Class Calculator
Determine star spectral class from temperature.
CMB Temperature Calculator
Calculate CMB temperature at given redshift.
Age on Planets Calculator
Calculate your age in planetary years based on orbital periods.
Star Distance Calculator
Estimate star distance using parallax angle.
Telescope Magnification Calculator
Calculate telescope magnification power based on focal lengths.
Telescope Field of View Calculator
Free online calculator with instant, accurate results.
Redshift Calculator
Free online calculator with instant, accurate results.
Kepler's Third Law Calculator
Free online calculator with instant, accurate results.
Schwarzschild Radius Calculator
Free online calculator with instant, accurate results.
Planetary Surface Gravity Calculator
Free online calculator with instant, accurate results.
Solar Noon Calculator
Free online calculator with instant, accurate results.
Moon Phase Calendar
Free online tool — fast, accurate results in your browser.
Your Weight Across the Planets
Free online tool — fast, accurate results in your browser.
About Space & Stars
61 free Space & Stars tools are listed on this page, led by Exoplanet Habitability Calculator, Moon Phase Calculator and Age on Other Planets Calculator in popularity order. Each computes its result directly in your browser and shows the formula it applies. The grid also covers Weight on Other Planets, so most common Space & Stars questions have a matching tool. No accounts, no fees — every answer ships with the arithmetic behind it.
What you can calculate
Exoplanet Habitability Calculator, Moon Phase Calculator, Age on Other Planets Calculator, Weight on Other Planets
Top Space & Stars Calculators
Age on Other Planets Calculator
Calculate your age in years on each planet in the solar system.
Moon Phase Calculator
Calculate the moon phase for any given date.
Weight on Other Planets
Calculate your weight on other planets.
Sunrise Sunset Calculator
Estimate sunrise and sunset times.
Exoplanet Habitability Calculator
Calculate habitability index for exoplanets.
FAQs about Space & Stars
What is the best calculator in the Space & Stars category?
The most popular Space & Stars tools on this site are Exoplanet Habitability Calculator, Moon Phase Calculator and Age on Other Planets Calculator, in that order. All are free, run instantly in your browser, and show their calculation steps — pick the closest to your case or try more than one.
Are the Space & Stars calculators free to use?
Yes — all 61 tools in the Space & Stars category are completely free: they run in your browser with no sign-up and never send your inputs anywhere. Enter your values and the result appears instantly, with the formula used shown.
How many calculators are in the Space & Stars category?
The Space & Stars category currently lists 61 free tools. The most used are Exoplanet Habitability Calculator, Moon Phase Calculator and Age on Other Planets Calculator, and all of them are reachable directly from the grid on this page, with no registration required.